Post on 13-Oct-2020
WGL Workshop Forschungsdaten, Berlin 2012
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Virtual Research Environment +
Datenmanagement für kosmologische Simulationen und
astronomische Surveys H. Enke
A. Khalatyan, A. Partl, J. Klar, K. Riebe
Leibniz-Institut für Astrophysik Potsdam (AIP)
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Astrophysikalische Simulationen
Jahr Simulationen Daten CPUh
1990 Zusammenstoss zweier Galaxien 323 Partikel
~ 20 Megabyte 10 000
2009 Zusammenstoss von Galaxien 10243 Partikel
~100 Terabyte 1 Mio.
2009 Grossräumige Strukturen im Universum Lokale Auflösung bis 40963 Partikel
~1 Petabyte 20-50 Mio.
2009 Sterndynamos ~50 Gigabyte
100 000
Black Hole Collisions ~5 Terabyte 1 Mio.
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Kosmologische Simulationen
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MW MW
z z = 0 z
Snapshots zu diskreten
Zeiten
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CLUES Projekt
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• Constrained Local UniversE Simulations • mehr als 40 Wissenschaftler aus über 10 Ländern • Reproduktion des “lokalen” Universum:
– grossräumige kosmologische Simulationen (109 Mpc/h) – Anfangsbedingungen für lokale Resimulationen mit hoher Auflösung
• Untersuchung der Bildung von Galaxien
MW
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CLUES Workflow
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Simulation Snapshots Computing Cluster
Analyse
Resultate gemeinsam nutzen
publizieren
Vergleich mit Beobachtungen
Rechnen der Simulation
Daten speichern
Modell: Anfangsbedingungen AA
CMB+weitere Komponenten
>100Tb
>10MCPUh
VRE
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Kollaborative VRE Elemente einer Virtuellen Forschungsumgebung (VRE)
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WMAP 5 Kosmologie
73%
Baryonische Materie 4.7%
Dunkle Materie
22%
0.5% Sterne
4% freies Gas
Dunkle Energie
0.1% Neutrinos, schwere Elemente
*K. Riebe(AIP)
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MultiDark Simulationen
WMAP5 Kosmologie • MultiDark Run 1 (MDR1)
– (1 Gpc/h)^3 box (1 Gpc ~ 3.26*109 Lichtjahre) – 2048^3 particles (~ 8.6 Milliarden) – Mass resolution 8.7*10^9 Msun/h
• Bolshoi Simulation (Klypin et al. 2010) – 250 (Mpc/h)^3 – 2048^3 Partikel – Mass resolution 1.35*10^8 Msun/h – Bessere Auflösung als Millennium,
MDR1, 1 Gpc/h
Bolshoi, 250 Mpc/h
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Halo Finder
Algorithmen
Kreise markieren Halos, mögliche Orte für
Galaxien
= eines der Hauptresultate für die weitere
Analyse
Halo Kataloge
Kosmologische Simulation
Snapshot, x-y Projektion
Halo Kataloge
Halo Position, Geschwindigkeit, Radius, Form ...
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Resultate der Analyse
• Halo Kataloge: (halo = Materie-Zusammenballungen) – Halo-Finder identifizieren Dark Matter Halos – Zentren der Halos, in denen Galaxien zu finden sind
Indexing substructure trees of dark matter halos according to a depth first ordering. In the database we store for each halo the root of the tree (treeRootId), the direct host of the halo (hostId), the last substructure in its subtree (lastSubId) and the main leaf index (mainLeafId) for easy lookup.
Comparing positions of dark matter halos for a 64 Mpc/h box, using two different halo catalogues: AHF (red) and Friends-of-Friends (blue)
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MultiDark Simulations Datenbank – Halo + Galaxien Kataloge für verschiedene Halofinder
(Position, Geschwindigkeit, Masse, Grösse, Form etc.) – kinematische and Dichte - Profile der Halos – Dunkle Materie Partikel-Verteilung einer Auswahl von
Zeitschritten – Feinstruktur und Merger-Trees
Teilvolumen der MultiDark Simulation Box, jeder Punkt = ein Dark Matter Halo
Massivster Cluster in einer Resimulation (dark matter density distribution)
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Web Interface zur Datenbank • Web interface: www.multidark.org
– direkter Zugriff zu Daten via Standard SQL Queries – Weitere Zugriffe: webservice via wget, IDL, R, Topcat – History und Resultat der eignen Queries in eigner Datenbank (registrierte Nutzer) – ausführliche Dokumentation – FAQ
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SQL Abfrage der Datenbank
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Massenverteilung von Halos bei z=0
Tabellendaten MDR1
Particle data (z = 0.5) 966 GB Particle data (z = 1) 966 GB Particle data (z = 3) 966 GB Extended particle data (z = 0) 4575 GB Halo and profile data 1503 GB Total: 8976 GB
Particle data (z=0.5)
Particle data (z=1.0)
Particle data (z=3.0)
Extended particle data (z=0); 51%
Halo and profile data; 16%
Tabellendaten Bolshoi Halo data 1195 GB Particle data z = 0 943 GB Halo profile data (no index) 2785 GB Halo profile data (index) 2550 GB Total: 7473 GB
Halo data 16%
Particle data (z=0) 13%
Halo profile data 37%
Halo profile data (index)
34%
Nutzung Argentina 1 Australia 3 Canada 2 Chile 2 Germany 17 Italy 2 Netherlands 1 Norway 1 Russian 1 Slovenia 1 Spain 10 UK 3 Ukraine 1 USA 21
132
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17
2
1
21
1
1 1 1
10
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Argentina Australia Canada Chile Germany 17 Italy Netherlands Norway Russian Slovenia Spain UK Ukraine USA
Nutzung Batch users > 100000: 1 Heavy users > 100 query: 11 Medium users < 100 queries: 25 One time users < 10 queries: 29 MediuOne ti
Batch users > 100000: 1
Heavy users > 100 query: 11
Medium users < 100 queries
25 One time users < 10 queries: 29
Herausforderung: Datenmanagement
• MultiDark DB Rohdaten (Simulation ‘snapshots’, Halo Kataloge...) sehr inhomogen: – von unterschiedlichen Gruppen erzeugt – an unterschiedlichen Supercomputern berechnet – mit unterschiedlichen Programmen
• Sammlung an einem Speicherort • Zeitlich versetzte Verfügbarkeit der Daten • Formatänderungen durch ‘data quality assurance’ • Iterative Prozesse mit Feedback zwischen
Simulatoren und DB Datenaufbereitern
data quality assurance / ingest
• Daten müssen verlässliche Qualität haben • Sind Daten korrekt nach Transfer zum zentralen
Server? • Sind Daten komplett oder integer? • Sind Daten vertrauenswürdig? (NANs, Infs)? • Sind Daten mit gleicher Version des Programms
erzeugt (Bugfixes wg. quality assurance checks)? • Sind Daten wissenschaftlich valide?
Limitierungen und Herausforderungen • Nutzerseitig:
– Komplizierte Queries mit Joins dauern Stunden: – Spatiale Queries auf Partikel sind nur bei Einzelobjekten machbar – Limititierung bei statistischen Fragestellungen
(e.g. suche alle Partikel in Halos oberhalb einer gegebenen Masse)
– Zugriff auf Partikel Daten ziemlich langsam
• Serverseitig: – Lange Ingest-Zeiten – Last-Verteilung – Performanz derzeitig verfügbarer (kommerzieller) DBs an der
Grenze
Derzeitige Strategie
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RAVE Survey:
RAVE (RAdial Velocity Experiment) Survey (Durchmusterung) des Südhimmels mit einem Multi-Fiber Spektroskop am 1.2-m UK Schmidt Teleskop des Australian Astronomical Observatory (AAO). Beobachtet werden Sterne der Milchstrasse. Die RAVE collaboration umfasst Wissenschaftler aus mehr als 20 Institutionen aus aller Welt. Das Projekt wird koordiniert vom Leibniz-Institut für Astrophysik Potsdam.
IM AIP: Datenreduktions-Pipeline für Spektren Datenreduktions-Pipeline für chemische Elementhäufigkeiten Rohdaten, reduzierte Daten Webservices für alle Daten der Kollaboration Erstellung, Kuratierung der Datenbanken/Kataloge für Analyse- Resultate für kollaborationsinterne und publizierte Daten Website: www.rave-survey.org RAVEDB Query Interface
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RAVE Survey:
RAVE (RAdial Velocity Experiment) Survey (Durchmusterung) des Südhimmels mit einem Multi-Fiber Spektroskop am 1.2-m UK Schmidt Teleskop des Australian Astronomical Observatory (AAO). Beobachtet werden Sterne der Milchstrasse. Die RAVE collaboration umfasst Wissenschaftler aus mehr als 20 Institutionen aus aller Welt. Das Projekt wird koordiniert vom Leibniz-Institut für Astrophysik Potsdam.
IM AIP: Datenreduktions-Pipeline für Spektren Datenreduktions-Pipeline für chemische Elementhäufigkeiten Rohdaten, reduzierte Daten Webservices für alle Daten der Kollaboration Erstellung, Kuratierung der Datenbanken/Kataloge für Analyse- Resultate für kollaborationsinterne und publizierte Daten Website: www.rave-survey.org RAVEDB Query Interface
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RAVE Survey:
Rohdaten: ca. 1.5 TB red. Daten I: ca. 2.0 TB red. Daten II: ca. 4.0 TB
publizierte Kataloge: Radialgeschwindingkeiten für ca. 80000 Sterne Distanzen für ca. 42000 Sterne Chem. Häufigkeiten für ca. 38000 St.
Kataloge f. das Projekt: Radialgeschwindigkeiten, Spektren, …
für ca. 460000 Sterne Distanzen für ca. 240000 Sterne Chem. Häufigkeiten für ca. 205000 St.
SDSS Mirror Potsdam (DR7) Daten: ca. 100 TB
Images: ca. 70 TB Spektren: ca. 20 TB Kataloge: ca. 12 TB 357 Millionen Objekte (SEGUE: 127 M, Legacy: 230 M) Spektoskopischer Katalog
SDSS Mirror Potsdam (DR7) Daten: ca. 100 TB
Images: ca. 70 TB Spektren: ca. 20 TB Kataloge: ca. 12 TB 357 Millionen Objekte (SEGUE: 127 M, Legacy: 230 M) Spektoskopischer Katalog
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LLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeegggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccyy: 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MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))ekkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkktttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttoooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooosssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssskkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkoooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooppissssschhhhhherrrrrr KKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaatttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaallllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllloooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooogg
Einordnung (Radieschen Schema) Rahmenbedingungen disziplinübergreifender Forschungsdateninfrastruktur (DFG)
Einordnung (Radieschen Schema) Rahmenbedingungen disziplinübergreifender Forschungsdateninfrastruktur (DFG)
CLUES
Multi Dark
RAVE
SDSS Mirror
33
eAstronomy : eScience+Astronomy